[Havoc]

I think it's perfectly fine that they grabbed that kid for illegal weapon possession on school grounds. Weapons do not belong on a school, not for assault nor defence. However, the fact that they punnish him from something that didn't happen on school grounds (if I get it right) is kind of silly. It's more of a matter for the police. Yes he was jumped, and yes the knife helped defend him and scare them off, that still doesn't justify having a knife at school.
I'm all for protecting yourself when you know you're going to dangrous places at dangrous times, but not just everywhere you go. I had times where I had to go to a dangrous area in the city in the middle of the night to get a large ammount of cash from an ATM. I didn't even doubt about bringing my gun along, even though it wasn't loaded. Luckily I never had to draw it, but I don't want to take the chance.
That still doesn't mean I take an unloaded gun everywhere I go for self protection.

Anyway, as for him being punished and other roaming free with much bigger weaponry, that's how the world works, deal with it.